#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main() {
    int a = 0;
    int b = 0;
    scanf("%d %d", &a, &b);
    int i = 0;
    int count = 0;
    for (i = 0; i < 32; i++)
    {
        if (((a >> i) & 1) ^ ((b >> i) & 1) == 1)
            count++;
    }
    printf("%d", count);
    return 0;
}
